Build: suppress deprecated JVM target warning globally

There seems to be no point in configuring the compiler argument per
project. This argument will be deleted soon anyway, when we remove
support for JDK 1.6 & 1.7.

Also remove `disableDeprecatedJvmTargetWarning`. It didn't have any
effect in all modules where it was applied because these modules
reassign `freeCompilerArgs` anyway, with
`-Xsuppress-deprecated-jvm-target-warning` in it.

core/compiler.common.jvm/build.gradle.kts

@@ -13,9 +13,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}

core/compiler.common/build.gradle.kts

@@ -15,9 +15,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}

core/descriptors.jvm/build.gradle.kts

@@ -19,9 +19,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}

core/descriptors.runtime/build.gradle.kts

@@ -5,8 +5,6 @@ plugins {
     id("jps-compatible")
 }
 
-// Only compilation tasks should use JDK 1.6
-project.disableDeprecatedJvmTargetWarning()
 tasks
     .matching { it.name == "compileKotlin" && it is KotlinCompile }
     .configureEach {

core/descriptors/build.gradle.kts

@@ -16,9 +16,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}

core/deserialization.common.jvm/build.gradle.kts

@@ -15,9 +15,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}

core/deserialization.common/build.gradle.kts

@@ -14,9 +14,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}

core/deserialization/build.gradle.kts

@@ -17,9 +17,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}

core/metadata.jvm/build.gradle.kts

@@ -13,9 +13,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}

core/metadata/build.gradle.kts

@@ -14,9 +14,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}

core/util.runtime/build.gradle.kts

@@ -13,9 +13,3 @@ sourceSets {
     "main" { projectDefault() }
     "test" {}
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
-    kotlinOptions {
-        freeCompilerArgs += "-Xsuppress-deprecated-jvm-target-warning"
-    }
-}